Pump jack



Patented Nov. 3, 1925.

UNITED STATES PATENT OFFICE.

PUMP JACK.

Application led April 30, 1925. ySerial No. 26,838.

provide an arrangement of parts in a pump jack especially adapted to the simplicity thereof and to provide for the easy removal of tubing from a well by the disposal of certain braces therein. l i

Another object of the invention 1s to provide a means for adjusting the stroke of the liack and to provide generally an improved jack of this sort.

The invention will be more fully under stood by reference to the following description, taken in connection with the accomf panying drawings forming part hereof and in which:

Figure 1 is a side elevational view of the invention,

Figure 2 is a view from the cable connecting end; and y Figures 3 and 4 are sectional views taken on lines 8 3 and 4-4 respectively.

Referring more in detail to the drawings, 1 denotes a base upon which is mounted a Sampson post 2, the latter being braced by a rod 3 and turnbuckle 4: in the manner shown. The turnbuckle arrangement is on the side of the post 2 and out of the way of the removal of tubing from the well and may be kept taut, the rod 3 and turnbuckle i being provided for the purpose of preventing backward and forward movement of the jack.

The post 2 has a bearing 5 which supports a pivot pin 6 secured to a member 7 and upon which is supported a walking beam 8. This beam has a bearing 9 for pivotally supporting a member 10. A second member 11 is pivotally secured in a bearing 12 on the base l. The members 10 and 11 thus form a toggle joint and are connected between and to a link 13 as shown in Figure 8, by the pin 13a, the link being secured to a power rod connection 1li. It will also be noted that the member 11 has apertures 15--15 for adjusting the stroke of the jack.

The opposite end of the walking beam 8 is provided with a bearing 16 in which is seated a link 16a for connection of the pump rod 17, the link adapted to move in the socket in the bearing.

From the above it will be obvious that the reciprocating motion of the rod connection 14 will operate the walking beam as indicated by the dotted lines in the drawing.

It should be understood, however, that various changes and modifications may be made in the invention without departing from the spirit and intent of the following claim: y

A pump jack of the character described comprising a base, a supporting post on the base, rigid bracing means connected at its opposite ends to the upper end of the post and to a portion of said base, an adjustable bracing means connected at one end to an upper portion of the post and its opposite end to a portion of said base arranged in substantial parallelism to said rigid bracing means, a walking beam pivotally supported on the upper end of the post, a right angu` larly formed rod having a portion thereof mounted in bearings upon one end of said walking beam, the opposite end of su-ch rod being flattened, a second right angularly formed rod having a portion thereof mounted for pivotal movement in bearings upon said base and having its remaining portion flattened and formed with a series of spaced openings, the flattened extremity of said first rod having openings formed therein, a link, and means adapted to be passed through the aligned openings in the flattened ends of said rods for pivotally and adjustably connecting said link thereto.

In testimony whereof I have signed my name to this specification. i

JULIoUs ownN HEARN. 

